Last year there were no vaccines! What you are saying is ridiculous. What will you say when this does not happen? I predict you will pretend you never said it.
Unless another new variant comes along, the pandemic is over in Japan, and Argentina, Israel, and every other country with a functional public health system and sane citizens. It will continue to kill hundreds of thousands of lunatics who refuse to be vaccinated.
As Japan is starting to open up its border more (e.g. allowing business and student visa arrivals) it is reasonably inevitable IMO that there will be a rise in cases. Hopefully it will keep to manageable levels.